Warren h



{.No Model;)

W. H. TAYLOR;

LATGH BOLT.

Patenhed Jan. 26," 1892.v

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UNITED STATi-:s

'PATENT Gr-FICE.

VARREN H. TAYLOR, OF STAMFORD, CONNECTICUT, ASSIGNOR TO THE YALE &.TOVNE MANUFACTURING COMPANY, OF SAME PLACE.

LATCH-BO LT.

SPECIFICATION forming part of Letters Patent No. 467,564, dated January26, 1892.

Application filed January 12, 1891. Serial No. 377,520. (No model.)

.To all whom it may conoern:

Be it known that I, VVARREN H. TAYLOR, of Stamford, in the county ofFairfield and State of Connecticut, have invented certain new and usefulImprovements in Anti-Friction Latch-Bolts, of which the following, is aspecification, reference being' had to theaccoinpanying drawings.

My invention is particularly well adapted for doors of post-officelock-boxes.

The object of my present invention is to provide a latch-bolt which,while certain in operat-ion, shall be easily retracted by shutting thedoor, so as to reduce the friction of that operation upon the forwardend of the bolt to the minimum. To accomplish this object, Iform my boltin two parts, the latch part sliding into the main part, which' latteris operated directly by the lock. The latch part is actuated by aseparate spring, which, as its only duty is to throw forward that part,may be Very weak, so that Very little power will be required to overcomeit. The main part of the bolt, operated by the lock, ,is thrown by theusual stift' spring, and this main part and .the latch part are soconnected that when the lock operates the main part the latch will beretracted. Consequently where this construction is employed even if thespring which actuates the main bolt should be broken the lock wouldstill be operative, because the latch part Would be thrown by its ownspring and the main part could be thrown by the key, so that the keycould be withdrawn.

In the accompan'ying drawings, illustrating my invention, Figure 1 is aview of a postoffice-box door-frame and door, the door being shown openFig. 2 is aview, on a larger soale, of the inside of a post-officelock-box door, showingthebolt mechanis'm partlyin section, so as toexhibit the interior construction and arrangement of parts. Fig. 3 is aview of the two parts of the latch-bolt detached from the othermechanism, but connected together.

Referring to the letters upon the drawings, A indicates a door-frame,and B a door hinged thereto suitable to form an ordinary metallie glazedfront for a post-office box.

O indicates theusual Yale tumbler-lock einployed on such doors, itscylinder provided with a Wing D for engaging with the main part of thelock-bolt to operate it.

E indicates the main partof my improved lock-bolt, with which the Wing Dengages by a notch e or in any suitable manner. The forward end of thispart is shown as hollow to receive a coiled spring F and has aLongitudinal pin-slot G. At the rear end of this main part is the usualstrong coiled spring H for automatically casting it, the spring and theentire bolt being carried in a hollow cross-piece I of the door,-asusual.

J indicates the latch part of the bolt, the shank K of which enters thehollow end of the main part of the bolt, where is placed a light coiledspring F, which tends to throw the latch part outward.

M is a pin projecting from the latch part and working in` the pin-slot Gand serving as aV guide and stop in the usual manner to limit the motionof the latch part and to pre- Vent it from coming out of the hollow mainpart. Ordinarily the parts of this bolt will occupy the relativeposition shown in Fig. 2; but when the door is being closed the latchpart will be retracted, as indicated in Fig. 3. The key of the lock willof course retract both parts of the bolt, and the spring I-I willoperate to cast both parts of the bolt into the locked position; butwhen in this position the latch part will yield by the compression ofthe small spring F without affecting the spring H, so that the door canbe easily shut.

I thus produce a simple latch-bolt that will operate with certainty andwith greater case than the ordinary latch-bolt, and consequently withless friction and wear.,

What I claim is-- The combination, with a lock adapted to carry asliding bolt, of a hollow main bolt E, with which the Wing D engages tothrow the bolt, said bolt being provided with the usual coiled spring Hat its rear, a small coiled 5 spring F Within its hollow forward part,and

a latoh part J, having a guide-pin M, Working in the pin-slot G of themain part of the bolt, whereby the latch part J may be operated byshutting a door upon which the look is applied Without Operating themain part of [o the b0lt,` substantially as set'forth.

In testilnany of all which I have hereunto subsoribed my name.

WARREN H. TAYLOR. Witnesses:

SGHUYLER MERRITT, GEO. E. WHITE.

